Texas Instruments SN74ALVC16374DL

Overview

SN74ALVC16374DL from Texas Instruments is a 16-bit edge-triggered D-type flip-flop designed for 3.3-V operation, featuring dual 8-bit sections with independent clock and output-enable controls, bus-hold circuitry on all data inputs, and ±24-mA output drive at 3.0 V. It operates across −40°C to 85°C and is packaged in a 48-pin shrink small-outline (DL) package. This device serves as a bidirectional bus register in high-density digital systems such as memory interfaces and I/O expansion modules.

For engineers reviewing the SN74ALVC16374DL datasheet, SN74ALVC16374DL pinout, SN74ALVC16374DL application, or SN74ALVC16374DL equivalent, key selection criteria include its 150-MHz maximum clock frequency, low 0.5-ns hold time, bus-hold functionality eliminating external resistors, and dual OE-controlled 8-bit output groups enabling flexible bus arbitration in 3.3-V logic systems.

Technical Context

The SN74ALVC16374DL implements two independent 8-bit positive-edge-triggered D-type flip-flop banks, each with dedicated clock (1CLK/2CLK) and output-enable (1OE/2OE) inputs. Its EPIC™ submicron CMOS process delivers fast propagation delay (4.2 ns typical at 3.3 V) and low ground bounce (<0.8 V).

Bus-hold circuitry actively maintains valid logic levels on all 32 data inputs (1D1–1D8, 2D1–2D8), while independent OE control allows selective tri-state management of each 8-bit output group without affecting internal latch states or clock operation.

Key Specifications

Pinout & Package

SN74ALVC16374DL uses a 48-pin shrink small-outline package (DL) with 300-mil body width, 0.5-mm lead pitch, and JEDEC MO-153 compliance. Pin 1 is marked by a beveled corner; pins are arranged in two 24-pin rows with GND/VCC distributed for noise reduction.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit registered buffer applications.

Compared with SN74LVC16374ADL, SN74ALVC16374DL eliminates external biasing components via bus-hold, reducing BOM and improving reliability in intermittently connected buses; versus 74ALVCH16374DL, it lacks power-down but offers identical speed and drive at lower unit cost for always-on industrial applications.

Availability

SN74ALVC16374DL is available at Aetrix Electronics and suitable for industrial I/O expansion, memory interface buffering, and communications backplane synchronization requiring stable component supply across extended product lifecycles.

Supply support for SN74ALVC16374DL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.

The SN74ALVC16374DL belongs to TI's ALVC (Advanced Low-Voltage CMOS) logic family, engineered for high-speed, low-noise 3.3-V digital interfacing in space-constrained industrial and telecom systems.

FAQ

What is the maximum clock frequency supported by the SN74ALVC16374DL?

The SN74ALVC16374DL supports a maximum clock frequency of 150 MHz across its full operating temperature range (−40°C to +85°C) and supply voltage range (2.3 V to 3.6 V). This specification is verified under standard load conditions (CL = 50 pF) and reflects guaranteed performance-not just typical values-making it suitable for demanding synchronous bus applications where timing margin is critical. The SN74ALVC16374DL achieves this with a typical propagation delay of 4.2 ns at 3.3 V.

Does the SN74ALVC16374DL require external pull-up or pull-down resistors on its data inputs?

No, the SN74ALVC16374DL does not require external pull-up or pull-down resistors on any of its 32 data inputs (1D1–1D8, 2D1–2D8) because it integrates active bus-hold circuitry on all inputs. This feature maintains the last valid logic state when inputs are floating, eliminating BOM components and PCB routing overhead. The bus-hold current is ±75 µA at 3.0 V, sufficient to override typical leakage and noise without affecting signal integrity. This behavior is inherent to the SN74ALVC16374DL design and requires no configuration.

How many independent output-enable controls does the SN74ALVC16374DL have, and what do they control?

The SN74ALVC16374DL has two independent active-low output-enable controls: 1OE (pin 1) and 2OE (pin 48). Each controls a separate 8-bit output group-1OE manages outputs 1Q1–1Q8 (pins 2–3, 5–6, 8–9, 11–12), and 2OE manages outputs 2Q1–2Q8 (pins 13–14, 16–17, 19–20, 22–23). When asserted low, the corresponding outputs drive high/low logic levels; when high, they enter high-impedance state without affecting internal latch operation or clock domains. This architecture enables flexible bus arbitration in SN74ALVC16374DL-based systems.

What package type is used for the SN74ALVC16374DL, and what are its key mechanical features?

The SN74ALVC16374DL uses a 48-pin shrink small-outline package (DL) with 300-mil body width, 0.5-mm lead pitch, and JEDEC MO-153 compliance. Key mechanical features include 12 dedicated GND pins and 8 VCC pins distributed across the perimeter to minimize ground bounce and power-supply impedance. The DL package measures 12.5 mm × 6.1 mm with 2.2-mm height, offering twice the I/O density of standard SOIC in the same PCB footprint. This package is distinct from the obsolete DGG (TSSOP) variant and is specifically validated for SN74ALVC16374DL.

Is the SN74ALVC16374DL suitable for operation at 2.5-V supply voltage?

Yes, the SN74ALVC16374DL is fully characterized and guaranteed for operation at 2.5-V supply voltage, as confirmed in the recommended operating conditions table (VCC min = 2.3 V, max = 3.6 V) and timing specifications (fclock = 150 MHz tested at VCC = 2.5 V ± 0.2 V). Electrical parameters-including VOH (≥2.0 V), VOL (≤0.4 V), and tpd (≤5.9 ns)-are specified across the full 2.3–3.6 V range. This makes the SN74ALVC16374DL compatible with mixed-voltage systems where 2.5-V logic coexists with 3.3-V domains, provided level-shifting is handled externally if interfacing with non-tolerant receivers.